To be honest - no I probably wouldn't buy any album of theirs. (If they ever make one lol!!). But would I go see them live? You bet I would. They put on a great show. That is why they got top votes.
X Factor is more about the TV programme than the singing contest. The really good singers don't need to win. The programme is showcase enough for them and they will get snapped up. But a TV programme without drama, unexpected twists, great visuals and 'pantomime villains' makes for a very boring series. No matter how much Simon Cowell protests, he wants J and E there.
I do agree with you actually, Lucie is a great singer and a very pretty girl. She is sorted now already though. She could walk away from the programme today and walk straight into a recording contract.